Improvement in steam-engines



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GEORGE W. WRIGHT, OIE-WASHINGTON, DISTRICT OE COLUMBIA, AssIGNOR TO FRANCIS WRIGHT, OE SAME PLACE.

Letters Patent No. 93,940, datezl'August 17, 1869.

IMPROVEMENT IN STEAM-ENGINES.

The Schedule referred to in these Letters Patent and making part of the same.

, panying drawings, which are lettered to correspond l with and form part ofthese specifications.

To enable the public to understand the natureof this my invention, rand those skilled in the mechanic artsto construct and use the same, I proceed to describe it as follows, to wit:

Figure 1, plate 1, is a horizontal sectional view of the` dome of a'steam-boiler, as represented by letters A A.

B B are two steam-cylinders, placed within the steam-dome. l

C C are revolving disks, to which motion is imparted by gea-rfwheels D D.

C' C' are revolving disks, through which the pistonrods E E pass, and to which motion is imparted by gear-wheels D' D.

Figure 2, plate 1, is a vertical sectional view of a horizontal steam-boiler.

A is the steam-dome.

B is the steam-cylinder.

-C and C- are the revolving disks, to which motion is imparted by gear-wheels D and D.

FF are exhaust pipes, leading to the condenser.

Figure 1, plate 2, is an end view ofthe two cylinders B B G G are the openings through which steam is ad- 'H H are Openings, through which steam is exhausted into exhaust-pipes F F, plate 1, iig. 2;

Figure 2, plate 2, are the disks C C; and

DVD are the gear-Wheels, by which the disks are made to revolve.

The manner in which this engine is to be constructed and worked is as follows:

The gea1"wheels D D, which revolve the disks, receive their motion from the main shaft', as seen in plate 1, iig. 1.

The disks C C, plate 1, fig. l, are plates-f metal, and are connected to the gear-wheels D D, by rods of metal of suitable dimensions passing through the cylinder-heads and the vertical sides of the steamdome A, as seen in plate 1, fig. 2,- having suitable packing to make them steam-tight. Y

The disks C C are constructed in a similar manner to the disks C C, and are connected to the gear-Wheels D' D' by means ofhollow cylinders, through which the pistonrods move, also being suitably' packed.

The cylinders, when bored out, are to have double heads; the inside one is to have two openings, as shown in plate 2, fig. 1, one marked G to be used to supply steam, and opening directly-into the boiler, and the other, marked H, to be connected to the eX- haust-pipes F F, plate 1, fig. 2.

The disks C C are to becountersunk, and ground into the heads of the cylinders, as shown in plate 1, li '1.

gl immerse the steam-cylinders B B inside the dome A A of the boiler, and stay and secure them, as is shown in plate 1, iig.v1, or in any other suitable The opening G, of the lcylinder B, and disk C,-

plate 2, figs. 1 and 2, now being set opposite each other, steam passes into the cylinder B.

When the requisite quantity has passed in, the sectional gear-wheels D n'ow come in gear, and the disk is made to revolve one-third of its circumference, which completely cuts olf the further ingress of steam to the cylinder and leaves it closed for the expansion of steam to finish the stroke.

lVhen the piston arrives at the end ofthe stroke, or near it, the gear-wheels D again come in gear, and the disk is made to revolve in the same direction-as before another third of its circumference, which last movement opens vthe exhaust H, leaving the feed G still closed. At this moment the gear-wheels, at the opposite end of the cylinder, come in gear, and the disk at that end is opened, and steam is admitted on that side of the piston, forcing it back to its startingpoint. When the piston arrives near the end of the return-stroke, the disk, by means o`' the gear-wheels, is given a backward revolution -of two-thirds. itscircumference, Which movement simultaneously closes theA exhaust and opens the feed, leaving the disk in the same position as at the start.

When one piston has made a half stroke, the disk on the other ycylinder cornes in position to admit the steam, and thus works the cranks at right angles to each other.

Claims. What I claim as my invention, and what I wish to secure by VLetters Patent of the United States, is-

1. The combination and arrangement of the movable disks C and C', at each end of the cylinders,-

steam, substantially upon the principle and in the..-

manner as herein .set forth'.

(l. lV. WRIGHT.

' W'it-nesses JAMES S. GRINXELL, J. E. M. BOWEN. 

